mewsh is a MEdiaWiki SHell.
mewsh is under development and is very much alpha now.
You might wonder, what's the use? But if you've ever used drush or wp-cli it'll be immediately clear to you.
Try mewsh --help
Also see http://wiki.yt/en/Mewsh
You're very welcome! Just jump in, start adding issues and sending in pull requests.
mewsh is being developed by Kasper Souren.